Company lists · Data refreshed September 2026

Top 25 Natural gas optimization companies based in Spain

Name: Natural gas optimization companies based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 168 companies tracked

RevenueBase identified 168 natural gas optimization companies headquartered in Spain as of September 2026 and tracks 1,646 professional contacts across them, including 156 with verified work emails. Madrid is the largest hub.

This list covers natural gas optimization companies headquartered in Spain, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

168Companies

1,646Contacts tracked

156Verified emails

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The 25 largest natural gas optimization companies based in Spain

Ranked by team size

Top 25 of 168 natural gas optimization companies based in Spain, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to natural gas optimization companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	AESA	Indirect evidence	Barcelona, SpainHQ checked Sep 20, 2026	n/a	351 contacts →
	Indirect evidence “Ingeniería y Consultoría Energética orientada a la búsqueda y el desarrollo de soluciones energéticas de alta eficiencia para sus Clientes.” Source: RevenueBase Database · checked Sep 20, 2026
2	Grupo Trebol Energia	Indirect evidence	Sant Joan Despi, SpainHQ checked Sep 20, 2026	51-200	84 contacts →
	Indirect evidence “We are one of the leading energy business consultancies in Spain.” Source: RevenueBase Database · checked Sep 20, 2026
3	NESS	Indirect evidence	Madrid, SpainHQ checked Sep 20, 2026	11-50	81 contacts →
	Indirect evidence “NESS, empresa de servicios energéticos especializada en la gestión y ahorro energético.” Source: RevenueBase Database · checked Sep 20, 2026
4	Azigrene Energy Consulting	Indirect evidence	Valencia/valència, SpainHQ checked Sep 20, 2026	51-200	58 contacts →
	Indirect evidence “Azigrene es una empresa de servicios de Consultoría e Ingeniería Energética, que desarrolla su actividad en- Reducción del coste: Definición de la mejor estrategia de compra…” Source: RevenueBase Database · checked Sep 20, 2026
5	Grupo Emececuadrado	Indirect evidence	Badajoz, SpainHQ checked Sep 20, 2026	11-50	33 contacts →
	Indirect evidence “Emececuadrado es una de las principales compañías del sector energético, especializada en el asesoramiento y la optimización de recursos energéticos para empresas, organismos…” Source: RevenueBase Database · checked Sep 20, 2026
6	Naturelek Energía E Ingeniería	Indirect evidence	Derio, SpainHQ checked Sep 20, 2026	51-200	30 contacts →
	Indirect evidence “Somos una ingeniería y consultora especializada en eficiencia, gestión y transformación energética para empresas, con un enfoque técnico, integral y orientado a resultados.” Source: RevenueBase Database · checked Sep 20, 2026
7	Ge&pe	Indirect evidence	Sevilla, SpainHQ checked Sep 20, 2026	11-50	30 contacts →
	Indirect evidence “GE & PE was created in 1983 with the purpose of covering the needs and increasingly complex management and efficiency tasks related to the supply and consumption of energy by…” Source: RevenueBase Database · checked Sep 20, 2026
8	Energy Tools	Indirect evidence	Olot, SpainHQ checked Sep 20, 2026	11-50	28 contacts →
	Indirect evidence “A Energy Tools, empresa líder en el mercat, ajudem, de manera ètica i transparent, les empreses amb grans consums energètics a prendre les millors decisions.” Source: RevenueBase Database · checked Sep 20, 2026
9	EDE Ingenieros	Indirect evidence	SpainHQ checked Sep 20, 2026	11-50	28 contacts →
	Indirect evidence “Empresa de servicios de Ingeniería y Consultoría Energética e Industrial, que desarrolla su actividad en las áreas de:* Generación y Uso Racional de la Energía en la Industria y…” Source: RevenueBase Database · checked Sep 20, 2026
10	OSL Iberia	Indirect evidence	Cartagena, SpainHQ checked Sep 20, 2026	51-200	27 contacts →
	Indirect evidence “OSL Iberia es una Ingeniería multidisciplinar con presencia internacional, formado por un equipo de profesionales creativos, que desarrolla e implementa soluciones de calidad y…” Source: RevenueBase Database · checked Sep 20, 2026
11	Soltec Ingenieros S.L	Indirect evidence	Vigo, SpainHQ checked Sep 20, 2026	11-50	23 contacts →
	Indirect evidence “Soltec Ingenieros SL, founded in 2001, is an independent engineering and consulting firm based in Vigo, Spain.” Source: RevenueBase Database · checked Sep 20, 2026
12	Cavo Energías	Indirect evidence	Valencia, SpainHQ checked Sep 20, 2026	11-50	20 contacts →
	Indirect evidence “Empresa de servicios energéticos, especializada en diversas disciplinas en materia de ahorro energético y con una amplia formación derivada de sus más de 15 años de experiencia en…” Source: RevenueBase Database · checked Sep 20, 2026
13	Mtech Energy Consulting	Indirect evidence	Pinto, SpainHQ checked Sep 20, 2026	1-10	19 contacts →
	Indirect evidence “Impulsamos la transformación digital de nuestros clientes en el ámbito de la energía, siendo especialistas en la gestión inteligente de los datos, prestando servicios de…” Source: RevenueBase Database · checked Sep 20, 2026
14	Integra Ingeniería	Indirect evidence	Manises, SpainHQ checked Sep 20, 2026	11-50	18 contacts →
	Indirect evidence “í.” Source: RevenueBase Database · checked Sep 20, 2026
15	Eficae Soluciones	Indirect evidence	Badajoz, SpainHQ checked Sep 20, 2026	11-50	15 contacts →
	Indirect evidence “Eficae Soluciones was founded in 2016 from the collaboration between three industrial engineers graduated from the University of Extremadura forming a multidisciplinary team in…” Source: RevenueBase Database · checked Sep 20, 2026
16	Aliara Energía	Strong evidence	Pozuelo De Alarcón, SpainHQ checked Sep 20, 2026	11-50	15 contacts →
	Strong evidence “Aliara personaliza las soluciones de eficiencia energética relacionadas con el gas natural: desde la auditoria energética, la financiación de proyectos o el mantenimiento con…” Source: RevenueBase Database · checked Sep 20, 2026
17	Ingebau Soluciones DE Ingeniería SL	Indirect evidence	Sevilla, SpainHQ checked Sep 20, 2026	1-10	14 contacts →
	Indirect evidence “Servicios de Ingeniería y Consultoría en general y Energía en Particular.” Source: RevenueBase Database · checked Sep 20, 2026
18	Anphis Engineering And Applied Technology Services	Indirect evidence	Paterna, SpainHQ checked Sep 20, 2026	11-50	13 contacts →
	Indirect evidence “We commit to solving complex challenges, transforming energy and process efficiency into real profitability.” Source: RevenueBase Database · checked Sep 20, 2026
19	Ifisa Ingeniería Diseño DE Skids	Indirect evidence	Leioa, SpainHQ checked Sep 20, 2026	11-50	12 contacts →
	Indirect evidence “IFISA es una ingeniería enfocada al mundo de las redes de fluidos industriales: Consultoría energética - Monitorización de equipos - Implantación ISO 50.001 - Legalización de…” Source: RevenueBase Database · checked Sep 20, 2026
20	Enerwatia	Indirect evidence	Alzira, SpainHQ checked Sep 20, 2026	11-50	10 contacts →
	Indirect evidence “Somos una empresa dedicada a los proyectos de eficiencia y consultoría especializada en el sector energético.” Source: RevenueBase Database · checked Sep 20, 2026
21	Soren Energia SL	Indirect evidence	Barcelona, SpainHQ checked Sep 20, 2026	1-10	9 contacts →
	Indirect evidence “SOREN Energia és una Empresa de Serveis Energètics (ESE).” Source: RevenueBase Database · checked Sep 20, 2026
22	Implica-T	Indirect evidence	Castellon, SpainHQ checked Sep 20, 2026	11-50	9 contacts →
	Indirect evidence “Ingeniería y arquitectura dedicada a la asesoría energética.” Source: RevenueBase Database · checked Sep 20, 2026
23	Zontak Energía	Indirect evidence	León, SpainHQ checked Sep 20, 2026	11-50	8 contacts →
	Indirect evidence “Hola!” Source: RevenueBase Database · checked Sep 20, 2026
24	EGM Energía	Indirect evidence	Viladecans, SpainHQ checked Sep 20, 2026	1-10	8 contacts →
	Indirect evidence “Somos una ingeniería consultoría proveedora de soluciones en el sector del ahorro y la eficiencia energética en edificios, especializada en el asesoramiento de la gestión integral…” Source: RevenueBase Database · checked Sep 20, 2026
25	Inerco Inspeccion Y Control S.A	Indirect evidence	Sevilla, SpainHQ checked Sep 20, 2026	11-50	6 contacts →
	Indirect evidence “INERCO INSPECCION Y CONTROL SA is an environmental services company based out of CALLE TOMÁS ALBA EDISON, SEVILLA, Sevilla, Spain.” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: natural gas optimization companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names natural gas optimization companies.
Partial evidence: Its own public description names part of natural gas optimization companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name natural gas optimization companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 168 natural gas optimization companies based in Spain

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Natural gas optimization companies based in Spain at a glance

As of Sep 20, 2026

9.5%Verified-email coverage

9.8Average contacts per company

1-10Median size (employees)

17.9%Largest-city concentration · Madrid

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

105

11-50

51-200

201-500

Email recency for this list is measured worldwide rather than for Spain, so it is reported there. Company counts and contact totals on this page are exact for Spain, over 168 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among natural gas optimization companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Spain whose own description of what they do matches “natural gas optimization companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names natural gas optimization companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among natural gas optimization companies, and records with no verified work email. Companies headquartered outside Spain are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 156 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Natural gas optimization companies by metro

Natural gas optimization companies in Madrid30

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names natural gas optimization companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many natural gas optimization companies are there based in Spain?

RevenueBase identified 168 natural gas optimization companies headquartered in Spain as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

AESA, headquartered in Barcelona, tops this list with the largest team on record.

Which city has the most natural gas optimization companies?

Madrid leads with 30 headquartered companies, followed by Barcelona (15) and Sevilla (11).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 156 verified decision-maker contacts tracked across these 168 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.